"Giant Rock is a large freestanding
boulder in the
Mojave Desert directly adjacent to
Landers, California, that covers 5,800 square feet (540 m2) of ground and is seven stories high. Giant Rock is purported to be the largest free standing
boulder in the world. In the 1950s it was a gathering point for
UFO believers. It is located on land which was at that time leased by
George Van Tassel, a purported flying-saucer
contactee and organizer of
UFO conventions."-Wikipedia
As shown in the photo, someone managed to get a car on to the top of the boulder. I have no idea how.